水幕系统防火分隔性能试验研究

Experimental study on the fire separation property of water curtain system

在喷头安装高度分别为12 m和18 m的情况下开展了防火分隔水幕系统在不同喷水强度下的防火隔热性能对比试验。设置4个工况,分析水幕作用下不同位置处的温度变化、热辐射变化。试验结果表明,在喷头安装高度提高后,喷头的洒水范围进一步扩大,造成单位体积下的水滴密度降低,其防火隔热性能也随之下降。有必要提高系统的喷水强度,以弥补由于安装高度提高后水幕系统在单位体积内的喷水密度下降,达到等效的防火隔热性能。

Experiments of fire separation property of fire separation curtain under different spray intensity were carried out when the height of nozzles was 12 m and 18 m. Four scenarios were set to test the temperature and heat radiation at different location under the work of water curtain. The results showed that the sprinkler range was enlarged by setting the nozzles higher, but the density of water mist and the fire separation performance decreased. It＇ s necessary to increase the spray intensity to make up the decrease of water mist density because of setting the nozzles higher, to get the equivalent fire separation performance.